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Advanced magnetic recording paradigms typically use large temperature changesto drive switching which is detrimental to device longevity, hence findingnon-thermal routes is crucial for future applications. By employing atomisticspin-lattice dynamics simulations, we show efficient coherent magnetisationswitching triggered by THz phonon excitation in insulating single speciesmaterials. The key ingredient is excitation near the $P$-point of the spectrumin conditions where spins typically cannot be excited and when manifold $k$phonon modes are accessible at the same frequency. Our model predicts thenecessary ingredients for low-dissipative switching and provides new insightinto THz-excited spin dynamics.

A route to minimally dissipative switching in magnets via THz phonon pumping